1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright (c) 1994-1997, by Sun Microsystems, Inc. 24 * All rights reserved. 25 */ 26 27 #include "quad.h" 28 29 #ifdef __sparcv9 30 #define _Q_qtoi _Qp_qtoi 31 #endif 32 33 /* 34 * _Q_qtoi(x) returns (int)*x. 35 */ 36 int 37 _Q_qtoi(const union longdouble *x) 38 { 39 unsigned int xm, fsr; 40 int i, round; 41 42 xm = x->l.msw & 0x7fffffff; 43 44 __quad_getfsrp(&fsr); 45 46 /* handle nan, inf, and out-of-range cases */ 47 if (xm >= 0x401e0000) { 48 if (x->l.msw == 0xc01e0000 && (x->l.frac2 & 0xfffe0000) == 0) { 49 /* return largest negative int */ 50 i = 0x80000000; 51 if ((x->l.frac2 & 0x1ffff) | x->l.frac3 | x->l.frac4) { 52 /* signal inexact */ 53 if (fsr & FSR_NXM) { 54 __quad_fqtoi(x, &i); 55 } else { 56 fsr = (fsr & ~FSR_CEXC) | FSR_NXA | 57 FSR_NXC; 58 __quad_setfsrp(&fsr); 59 } 60 } 61 return (i); 62 } 63 i = ((x->l.msw & 0x80000000)? 0x80000000 : 0x7fffffff); 64 if (fsr & FSR_NVM) { 65 __quad_fqtoi(x, &i); 66 } else { 67 fsr = (fsr & ~FSR_CEXC) | FSR_NVA | FSR_NVC; 68 __quad_setfsrp(&fsr); 69 } 70 return (i); 71 } 72 if (xm < 0x3fff0000) { 73 i = 0; 74 if (xm | x->l.frac2 | x->l.frac3 | x->l.frac4) { 75 /* signal inexact */ 76 if (fsr & FSR_NXM) { 77 __quad_fqtoi(x, &i); 78 } else { 79 fsr = (fsr & ~FSR_CEXC) | FSR_NXA | FSR_NXC; 80 __quad_setfsrp(&fsr); 81 } 82 } 83 return (i); 84 } 85 86 /* now x is in the range of int */ 87 i = (int) (0x40000000 | ((xm & 0xffff) << 14) | (x->l.frac2 >> 18)); 88 round = i & ((1 << (0x401d - (xm >> 16))) - 1); 89 i >>= (0x401d - (xm >> 16)); 90 if (x->l.msw & 0x80000000) 91 i = -i; 92 if (round | (x->l.frac2 & 0x3ffff) | x->l.frac3 | x->l.frac4) { 93 /* signal inexact */ 94 if (fsr & FSR_NXM) { 95 __quad_fqtoi(x, &i); 96 } else { 97 fsr = (fsr & ~FSR_CEXC) | FSR_NXA | FSR_NXC; 98 __quad_setfsrp(&fsr); 99 } 100 } 101 return (i); 102 } 103